Apparatus for subjecting cast-metal ingots to pressure



A. TEDESCO. APPARATUS FOR SUBJECTING CAST METAL INGOTS T0 PRESSURE. APPUCATIQN FILED JUNE6. 1919;

1,364,655; Pat ted Jan. 4, 1921.

UNITED STATES PATENT OFFICE.

ARRIGO TEDESCO, OF TURIN, ITALY, ASSIGNOR TO SOCIETA AN ONIMA STABILIMEN TI BIAK, OF TURIN, ITALY, A COMPANY OF ITALY.

APPARATUS FOR SUBJECTING GAS'I1\l[Il:l1TA L INGOTS TO PRESSURE.

Specification of Letters Patent.

Patented Jan. 4-, 1921.

Application filed June 6, 1919. Serial No. 302,215.

T 0 all whom it may c0ncem':

Be it known that I, Annico Tnonsoo, sub ject of the King of Italy, and resident of Turin, Italy, have invented certain new and useful Improvements in Apparatus for Subjecting Cast-Metal Ingots to Pressure, of which the following is a specification.

This invention relates to apparatus for subjecting cast metal ingots to pressureduring the cooling of the same in the ingot mold. for the purpose of removing faults due to contraction of metal when cooling.

This invention has for its objecta pressure ingot mold so designed as to join advantages secured by both strong and simple constructions and to comply with all requirements concerning as well the easy manipulation as the character of the material obtained.

The annexed drawing shows by way of example one embodiment of the invention, Figure 1 being a central sectional view of the improved mold and Fig. 2 a fragmental plan view of the bottom P01131011. thereof.

As shown in said drawing the ingot mold comprises a hollow body or recelyer 1 mounted on an inclined stand 2 which is secured, as by means of bolts 2, to a foundation 3 this latter providing a recess or discharging pit 4 at the lower mouth of said receiver 1.

Near the top portion of the receiver 1 the wall of the same is provided with an opening to permit the interior of the receiver 1 to communicate with a hopper 5 into which the molten metal is cast or poured. on the stand 2 is further mounted to slide a piston 6 which projects into receiver 1 said piston being operated by any suitable device for exerting thereon the required pressure; in the construction illustrated said piston 6 is operated by the stem 7 of a piston (not shown) mounted in a double action cylinder 8 into which a fluid pressure may be caused to operate in either direction by means of a controlling device of any kind.

The lower mouth of receiver 1 is closed by a plug 9 which is held in its closing position by a suitable locking device of any kind. In the construction illustrated in Fig. 2, said locking device comprises a transverse bar 10 piyoted at one end on a block 16 which is adjustably connected by means of a threaded spindle 15 with a similar block 17 pivoted on an extension 18 of the receiver '1. Said bar 10 is provided at its opposite end with a recess through which passes a threaded bolt 12, the latter carrying a hand wheel 11. Said bolt is pivoted to an extension 18 on the receiver opposite the extension l8, so that by loosening the hand wheel and swinging the bolt 12 outwardly, the bar 10 may be moved away from the receiver and the plug 9 then withdrawn. In the construction illustrated the transverse bar 10 is provided with a rounded projection 13 designed to fit into a corresponding seat in plug 9; the same result may obviously be obtained by any other means as the plug 9 may be held in its closing position by wedges, screw threads, slot and tooth devices or the like.

lVhen it is desired to cast metal in the ingot mold the parts of this latter are arranged in the position shown in the drawing; that is, the plug 9 is arranged to close the lower mouth of receiver 1 and the piston 6 is inserted a slight distance into the upper mouth of the same above the opening connecting the interior of the receiver with hopper 5.

The molten metal is then poured into said holpger until the interior of the receiver is l ec.

Owing to the inclined 1 and to the fact that the hopper 5 communicates with it at the upper portion of the same, the gases are easily discharged and the impurities which are incorporated into the hopper 5 or at least in the portion of body 1 adjacent to the opening leading to said hopper.

Thereafter the piston 6 is driven in by means of its operating device and said impurities are thus discharged as the metal located at the upper portion of body 1 is exhausted while piston 6 is running forward to cover the opening leading to hopper 5, the molten metal being subjected to pressure when said opening has been closed.

When the ingot has solidified piston 6 is moved back and plug 9 is removed; thereafter piston 6 is moved forward again thus forcing the ingot out of body 1 into the pit 4.

In order to facilitate the discharge of the ingots from body 1, the lower portion of the latter is preferably flared.

The inclination of body 1 on its stand may vary within wide ranges according to the position of the bodymolten metal are caused to float in character of the metal to be cast; the same may conveniently be comprised between 15 and 45.

lhe described apparatus provides a very strong construction because of the inclined position of the body 1, this allowing said body to rest to a full extent on a stand firmly secured to the ground, said stand carrying also the members operating the piston.

Further the operation of the apparatus is made very easy there being no moving parts to manipulate with the exception of piston 6 and plug 9, the ingot being obtained in the best condition as the gases and impurities are fully removed.

By providing said plug 9 with a hole or recess 14 as shown in the drawing, a projection or fin is formed on the ingot which may be used as a test sample.

\Vhat I claim as my invention and desire to secure by United States Letters Patent 1. An apparatus for subjecting cast metal ingots to pressure during cooling, comprising an inclined hollow body, removable means for closing the lower mouth of the same, means located near the uppermost portion of said body for pouring molten metal therein, a piston adapted to slide in the uppermost portion of said body, and means for operating said piston.

.2. An apparatus for subjecting cast metal ingots to pressure during cooling, comprising an inclined hollow body ,removable means f0 rclosing the lower mouth of the same, means adjacent to said body for pouring molten metal therein and communicating with the uppermost portion of the interior of the same through an opening, a piston adapted to be forced into said hollow body to exert pressure for exhausting through said opening the material collecting in the uppermost portion of said body and means for operating said piston.

3. An apparatus for subjecting cast metal ingots to pressure during cooling comprising an inclined stand, a hollow body mounted on the same, removable means for closing the lower mouth of said body, a discharging pit in register with said lower mouth, means located near the uppermost portion of said body for pouring molten metal therein, a piston adapted to slide in the uppermost portion of the body, and means on said stand for operating said piston.-

4. An apparatus for subjecting cast metal ingots to pressure during cooling comprising an inclined hollow body, removable means for closing the lower mouth of said body, a pouring hopper adjacent to said body and communicating with the uppermost portion of the interior thereof through an opening, a piston adapted to be forced into said body to exhaust through said opening the material collecting in the uppermost p0r- F tion of said body and to exert a pressure on said metal after said opening has been closed by the piston, and means for operating said piston.

5. An apparatus for subjecting cast metal ingots to pressure during cooling comprising an inclined hollow body, a plug closing the lower mouth of said body, a member for locking said plug, said plug and member having cooperative engaging surfaces, means located near the uppermost portion of the body for pouring molten metal therein and means for exerting a pressure on said metal.

6. An apparatus for subjecting cast metal ingots to pressure during cooling comprising an inclined hollow body, removable means for closing the lower mouth of the same, said means having a recess therein to form a projection on the cast metal ingot, means located near the uppermost portion of the same body for pouring molten metal therein, and means for exerting a pressure on said metal.

Signed at Turin, Italy, this 19th day of May, A. D.,- 1919.

ARRIGO TEDESCO. 

